Circular knitting machine



FIG. 1 is a perspective view of a circular knitting machine in accordance with the present design;

FIG. 2 is a left side view thereof;

FIG. 3 is a rear side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a front side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

Generally, the invention pertains to an ornamental design for an article of manufacture. The article is not limited to the scale shown herein.

The broken line portions of the figures are included to show unclaimed subject matter only and form no part of the claimed design. 

CLAIM The ornamental design of a circular knitting machine, substantially as shown and described. 